A majority of developers with 20 or fewer apps make less than $1000 per month.

A new survey conducted by Vserv.mobi finds that the mobile development industry continues to struggle with app distribution and monetization. Among those surveyed, 84 percent named distribution as a key challenge, and 82 percent said the same about monetization. Other key findings in the survey included the following:

Almost three-quarters of mobile developers have been in the business less than three years.

100 percent of developers with one app, 85 percent of those with two to five apps and 77 percent of those with six to twenty apps make less than $1,000 per month.

Among developers with more than twenty apps, 42 percent make less than $1,000 per month, 44 percent make $1,001-$10,000, 6 percent make $10,001-$50,000 and 8 percent make more than $50,000.

90 percent of app developers are integrating social networking features or plan to do so.

68 percent of developers build cross-platform apps; PhoneGap is the most popular cross-platform development tool.